/**
 * Created on 19-Jul-2006
 * Created by Allan Crooks
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */
package org.gudy.azureus2.pluginsimpl.local.torrent;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.plugins.torrent.TorrentAttribute;
import org.gudy.azureus2.plugins.torrent.TorrentAttributeEvent;
import org.gudy.azureus2.plugins.torrent.TorrentAttributeListener;

abstract class BaseTorrentAttributeImpl implements TorrentAttribute {

    private List listeners;

    protected BaseTorrentAttributeImpl() {
        listeners = new ArrayList();
    }

    public abstract String getName();

    public String[] getDefinedValues() {
        return new String[0];
    }

    public void addDefinedValue(String name) {
        throw new RuntimeException("not supported");
    }

    public void removeDefinedValue(String name) {
        throw new RuntimeException("not supported");
    }

    public void addTorrentAttributeListener(TorrentAttributeListener l) {
        this.listeners.add(l);
    }

    public void removeTorrentAttributeListener(TorrentAttributeListener l) {
        this.listeners.remove(l);
    }

    protected List getTorrentAttributeListeners() {
        return this.listeners;
    }

    protected void notifyListeners(TorrentAttributeEvent ev) {
        Iterator itr = this.listeners.iterator();
        while (itr.hasNext()) {
            try {
                ((TorrentAttributeListener) itr.next()).event(ev);
            } catch (Throwable t) { // Does it need to be Throwable?
                Debug.printStackTrace(t);
            }
        }
    }

}
